CVE-2026-96890
highpriority · track · 35EPSS 0.005 · 41 %ileDEUSEPSS · scored 2026-10-27
A Server-Side Request Forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed a repository contributor to cause the appliance to issue requests to attacker-controlled internal hosts, which could be chained to achieve remote code execution on the appliance. The secret scanning validator for GCP service account credentials trusted the token endpoint embedded in a committed credential and issued a request to it without restricting the destination. Exploitation required an authenticated user with permission to push to a repository on an instance with GitHub Advanced Security and secret scanning validity checks enabled, a non-default configuration. This vulnerability affected GitHub Enterprise Server 3.20, 3.21, and 3.22 and was fixed in versions 3.20.9, 3.21.7, and 3.22.2. This vulnerability was reported through the GitHub Bug Bounty program.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.3–8.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (13)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3764Microsoft GitHub Enterprise: Mehrere SchwachstellenDeutsch2026-10-06csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft GitHub Enterprise ausnutzen, um Daten zu manipulieren, und um beliebigen Programmcode auszuführen.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
- https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.9Release NotesVendor Advisory
- https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.7Release NotesVendor Advisory
- https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.2Release NotesVendor Advisory
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